Fig. 9From: Simultaneous inversion for source field and mantle electrical conductivity using the variable projection approachRelative error between the estimated and the true \({\varepsilon_{2}^1}(\omega )\) coefficients for different variants of the VP method at different inversion iterations (color-coded). Shown are full-VP (left), VP-RW2 (middle), and VP-RW3 (right)Back to article page